Announcement

Collapse
No announcement yet.

front end swap -wheel bearing advice needed

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    front end swap -wheel bearing advice needed

    I'm currently working on a zx6r front end swap on a 78 GS750 frame with a GS wheel. The zx6r axle is 25mm (25x47x12 bearing) and the gs750 runs a 15mm axle (15x42x13mm bearing). So in theory I would need a 25x42x13 bearing. However, that is an oddball size. 25x42x9 seems to be the common size for that ID/OD. I'm trying to keep cost down and do things as easy as possible, so I would like to avoid machine work since I don't have the equiment to do it myself. However, safety is number one priority so I want to make sure this is all done safely. I did locate a place in the UK that has 25x42x12 bearings. I have spoke with them via email to confirm the size and they tell me that is correct. I have not found that size anywhere else. I also found a 25x42x18 double roller. However, I don't know if I could make that width work and they are $40+ each which is getting pricey for bearings.

    So I guess my concern is if the 25x42x12 bearing will be suitable for use as a wheel bearing due to the minimal difference between the ID/OD. Or would the 9mm be sufficient? It was also suggested to use two of the 9mm on each side. I'm not sure if that would be ok to do. So any suggestions/opinions would be appreciated.

    Thanks.
    Tags: None
    #2
    get a spacer/sleeve made, 15mm i/d x 25mm o/d. same width as the GS axle and use that in the wheel with the GS axle. a machine shop will charge peanuts to knock that up
    1978 GS1085.

    Just remember, an opinion without 3.14 is just an onion!

    Comment

      #3
      The gs axle is too short to do that

      Comment

        #4
        Originally posted by Agemax View Post
        get a spacer/sleeve made, 15mm i/d x 25mm o/d. same width as the GS axle and use that in the wheel with the GS axle. a machine shop will charge peanuts to knock that up

        Pretty sure he's not using the GS axle.
        Last edited by hillsy; 11-06-2013, 09:23 AM.
        Current:
        Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

        Past:
        VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
        And a bunch of other crap Yamahas....

        Comment

          #5
          Originally posted by hillsy View Post
          Pretty sure he's not using the GS axle.
          Correct. The GS axle is about an inch shorter than the zx6. Also the zx6 axle is hollow so I can't have that turned down.

          I did also discover that the xs650's use 47od bearing and are 36 spokes as well (btw im using spoked wheels if I didn't mention that already). So that would be another option if it came down to it.

          Comment

            #6
            Originally posted by hillsy View Post
            Pretty sure he's not using the GS axle.
            well he didn't mention that in his first post. again, it wont cost a lot to have a new longer axle machined.......
            1978 GS1085.

            Just remember, an opinion without 3.14 is just an onion!

            Comment

              #7
              Originally posted by Agemax View Post
              well he didn't mention that in his first post. again, it wont cost a lot to have a new longer axle machined.......
              No it wont cost a fortune to have an axle made, but certainly more than the $5-10 that a pair of bearings cost.

              Comment

                #8
                This might help you:

                Index of /
                http://www.thebikebearingshop.co.uk/


                Click on "find a bearing" and you can search for what bearings are in what bikes.
                Current:
                Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

                Past:
                VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
                And a bunch of other crap Yamahas....

                Comment

                  #9
                  Originally posted by Tukn20s View Post
                  No it wont cost a fortune to have an axle made, but certainly more than the $5-10 that a pair of bearings cost.
                  If he can source the correct bearings for the job! otherwise some machining may be the only option.
                  1978 GS1085.

                  Just remember, an opinion without 3.14 is just an onion!

                  Comment

                    #10
                    Originally posted by Agemax View Post
                    If he can source the correct bearings for the job! otherwise some machining may be the only option.
                    25x42x9 bearings are easy to get. I also found a source that supposedly has 25x42x12 which would be ideal. My concern is.....even though these bearings fit, are they safe for my application

                    Comment

                      #11
                      Originally posted by Tukn20s View Post
                      25x42x9 bearings are easy to get. I also found a source that supposedly has 25x42x12 which would be ideal. My concern is.....even though these bearings fit, are they safe for my application
                      they will be perfectly safe as long as they are deep groove roller bearings. 1mm less on the width will not hurt at all.
                      1978 GS1085.

                      Just remember, an opinion without 3.14 is just an onion!

                      Comment

                        #12
                        Originally posted by Agemax View Post
                        they will be perfectly safe as long as they are deep groove roller bearings. 1mm less on the width will not hurt at all.
                        Probably a stupid question....are deep groove bearings a type of radial bearing or are all radial bearings considered deep groove?

                        These are the bearings.... http://m.ebay.com/itm/331057557812?nav=WATCHING&sbk=1

                        Comment

                          #13
                          http://www.wibearing.com/NTN-6905Z/


                          these are deep groove bearings, ideal for wheel bearings. but, the 6905's are only 9mm wide instead of 13mm. i guess they would be ok but i would get a 4mm spacer made to sit in the wheel hub to make up the extra space. consider replacing them more often as a precaution
                          1978 GS1085.

                          Just remember, an opinion without 3.14 is just an onion!

                          Comment

                          Previous template Next
                          Working...
                          X